Add TO to remove post-transformation manual instruction

[fabiocarvalho777]

Sometimes a post-transformation manual instruction, added in a prior upgrade step, might not be necessary anymore, if it got fully automated in a following upgrade step executed in the same upgrade path.

In cases like this, the upgrade step that automated that manual instruction should have a way to tell Butterfly to remove the manual instruction document.

Add a TO, named RemoveManualInstruction, to enable this feature.

Also, this TO should result in a graceful "no-op" if the manual instruction document is not there, in case the upgrade step was executed after the user had a chance to take care of it manually.